Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Switch: BRHMALWDDS0

Remotes:

Switch Switch name Switch type
HNVIAL03DS0  HUNTSVILLE  DS 
RFRMALXARS1  REFORM  RS 
THRSALXARS1  THORSBY  RS 
TSCLALBXRS0  TUSCALOOSA  RS 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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